8. Determine which of the following systems is correct. 2x12x22x3 = = 4, 3x1+5x2+x3 = −8, -4x1-7x2 - 2x3 = 13 (a) This system has a unique solution; (b) This system has only two solutions; (c) This system has no solutions; (d) This system has infinitely many solutions; (e) None of these

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